1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.hadoop.hbase.coordination;
19
20 import org.apache.hadoop.hbase.classification.InterfaceAudience;
21 import org.apache.hadoop.hbase.CoordinatedStateManager;
22 import org.apache.hadoop.hbase.Server;
23
24 /**
25 * Base class for {@link org.apache.hadoop.hbase.CoordinatedStateManager} implementations.
26 * Defines methods to retrieve coordination objects for relevant areas. CoordinatedStateManager
27 * reference returned from Server interface has to be casted to this type to
28 * access those methods.
29 */
30 @InterfaceAudience.Private
31 public abstract class BaseCoordinatedStateManager implements CoordinatedStateManager {
32
33 @Override
34 public void initialize(Server server) {
35 }
36
37 @Override
38 public void start() {
39 }
40
41 @Override
42 public void stop() {
43 }
44
45 @Override
46 public Server getServer() {
47 return null;
48 }
49
50 /**
51 * Method to retrieve coordination for split log worker
52 */
53 public abstract SplitLogWorkerCoordination getSplitLogWorkerCoordination();
54 /**
55 * Method to retrieve coordination for split log manager
56 */
57 public abstract SplitLogManagerCoordination getSplitLogManagerCoordination();
58 }